Even though time, dates, and years are rather arbitrary when it comes to investing, it gives investors a benchmark to compare their returns to well… anything. Just like those investors, each year we like to look back to see if buying and holding a couple commodity markets over the course of a year are doing better than investing in the ETFs that supposedly track them: Crude Oil (USO), Natural Gas (UNG), Corn (CORN), Copper (JJC), Coffee (JO), and Wheat (WEAT).
Typically, the ETFs underperform a simple strategy of buying the December futures contract and rolling it annually...................................Full Article: Source